I have that and it works awesome. When I turned wrenches I did that to every single rotor I machined. Also the rotors were always washed in warm soapy water so make sure they were as clean as possible.
Originally Posted By: The Critic
Found this video: https://www.youtube.com/watch?v=nVOb7yX1qy8 Looks like it can work just fine with an electric drill. I'm going to order one kit (240-grit) and give it a try.